Which statement about color vision tests is true?

• A. It measures color vision using plates with numbers
• B. It measures intraocular pressure
• C. It measures central vision
• D. It measures peripheral vision

Answer: (A)

Color vision testing assesses how well a person can distinguish colors, and a common method uses plates filled with colored dots that form a number. If color discrimination is intact, the number stands out clearly; if not, it may be misread or missed, revealing a color vision deficiency.

Other tests measure different things: intraocular pressure is checked with tonometry to assess glaucoma risk, central vision relates to sharpness of sight (often tested with acuity charts), and peripheral vision is evaluated to map the sides of the visual field (often with perimetry). These tests don’t specifically assess color discrimination, which is why using plates with numbers is the true description of color vision testing.